#!/usr/bin/python3

###################################
# 标准库
import os
print(os.getcwd())
print()

import glob
print(glob.glob('./*.py'))
print()

import sys
print(sys.argv)
# sys.exit()
print()

import re
result = re.findall(r'\bf[a-z]*', 'which foot or hand fell fastest')
print(result)
print()

import math
result = math.log(1024, 2)
print(result)
print()

import random
print(random.random())
print(random.randrange(100))
print()

from datetime import datetime
print(datetime.now())
print(datetime(2019, 11, 1, 0, 0, 0, 0))
print()

import zlib
data = b'witch which has which witches wrist watch'
print(len(data))
after = zlib.compress(data)
print(len(after))
back = zlib.decompress(after)
print(len(back))
print()



